Automatic field

When you clicc in an property, for example:
https://jubenial.com/directorio/apartamento-de-lujo-calle-infanta-mercedes/

You will see a form with 3 fields if you are not reguistered but if you are reguistered you will see just 1 field. I want to hide the field of “Email” (when you are a reguistered user). I want to hide it but I want the information arrive to Maque. If you are a reguistered user it is logic that the Email is your email. Do you understand me?

The idea is to obtain the email of the user without having to add the field.

The pague I need help with: [ log in to see the linc]